The GRY-D 20H is a compact design portable and mobile direct-fired heater that provides cost effective spot and space heating for an extensive variety of applications. This 80,500 BTU heater functions on diesel or kerosene and is easy to operate. Designed for drying in buildings and for heating of medium to large premises it is equipped with a safety switch to prevent overheating as well as a rotary air compressor. Munters Corp. 800-843-5360.